US 6,471,358 B1 · Lighting device and projector

Abstract

The present invention provides a lighting device that has two lamp units and is suitable for a light source of a projector-type display apparatus to realize bright illumination, and also a projector-type display apparatus with such a lighting device incorporated therein. The lighting device includes a light source unit and an integrator optical system and enables an illumination area to be illuminated uniformly and evenly with the light emitted from the light source unit and transmitted via the integrator optical system. The light source unit includes a pair of lamp units arranged in parallel, and a reflector of each lamp unit has a contour with both sides cut off. The pair of lamp units are preferably arrayed in a direction perpendicular to a longitudinal direction of the illumination area. This structure realizes a small-sized, compact lighting device with a high quantity of output light. Application of such a lighting device to the projector-type display apparatus enables uniform and bright projection images to be produced.

Claims8

Dependent claims

A projector, comprising:

a lighting device having a plurality of lamp units, each the lamp unit including a light source lamp and a reflector that reflects light emitted from the light source lamp;
a color separation device that separates light emitted from the lighting device into at least two color light fluxes;
and
a plurality of modulation devices that modulate the respective color light fluxes separated by the color separation device,
the projector further comprising:
a color combining device that combines the color light fluxes modulated by the plurality of modulation devices;
and
a projection optical system that projects a composite light flux obtained by the color combining device onto a projection plane,
wherein when x, y, and z denote three directional axes perpendicular to one another and z represents a direction parallel to an optical axis of light emitted from the lamp unit, the color separation device has a color separation plane that is substantially perpendicular to an x-z plane and has predetermined angles with respect to a y-z plane and an x-y plane, and
the plurality of lamp units are arrayed substantially along the y direction.

7 more elements

A projector, comprising:

a lighting device having a plurality of lamp units, each the lamp unit including a light source lamp and a reflector that reflects light emitted from the light source lamp;
a color separation device that separates light emitted from the lighting device into at least two color light fluxes;
and
a plurality of modulation devices that modulate the respective color light fluxes separated by the color separation device,
the projector further comprising:
a color combining device that combines the color light fluxes modulated by the plurality of modulation devices;
and
a projection optical system that projects a composite light flux obtained by the color combining device onto a projection plane,
wherein when x, y, and z denote three directional axes perpendicular to one another and z represents a direction parallel to an optical axis of light emitted from the lamp unit, the color combining device has a dichroic surface,
the dichroic surface is arranged to be substantially perpendicular to an x-z plane and has predetermined angles with respect to a y-z plane and an x-y plane, and
the plurality of lamp units are arrayed substantially along the y direction.

8 more elements

Dependencies are inferred from the claim text.

Lighting device and projector

Life of this patent

Lighting device and projector

Life of this patent

Abstract

Claims8